Safety gas-cock.



PATENTED SEPT. 27, 1904.

I E. D..BOOZ.

SAFETY GAS COCK.

APPLICATION FILED APR. 18, 1904,

NO MODEL.

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UNITED STATES Patented September 27, 1904.

PATENT OFFICE.

SAFETY GAS-COCK.

SPECIFICATION forming part of Letters Patent No. 771,040, dated September 27, 1904.

Application filed April 13, 1904. Serial No. 203,589. (No model.)

Be it known that I, EDWARD D. Booz, a citizen of the United States, residing at Baltimore, State of Maryland, have invented certain new and useful Improvements in Safety Gras- Cocks, of which the following is a specification.

My invention relates to improvements in safety gas-cocks, and has for its object to provide a device of an improved construction to automatically lock the plug-valve when the latter is turned to the cut-off position and prevent the accidental turning of the valve again as the hand is removed from the key.

The invention is illustrated in the accompanying drawings, Figure 1 illustrating a side elevation of the device as the same appears when in the cut-off position; Fig. 2, a vertical longitudinal section through the cock and plugvalve, the latter being shown in the cutoff position. Fig. 3 illustrates a side elevation of the cock and plug-valve as the same appears when in the open position, the lower portion of the valve being sectioned. Fig. 4 shows a vertical section on the line 4 4 of Fig. 1. Fig. 5 is a horizontal section on the line 5 5 of'Fig. 3, and'Fig. 6 illustrates a bottom plan view of the cap-plug.

In the drawings, a designates the socket member of a gas-bracket which is to be attached to a supply-pipe in the usual manner. This socket member is provided with the usual passage-way a and conical valve-seat a and receives the conical plug-valve b, which is secured in the usual or any preferred manner. The socket member is also provided adjacent the valve-seat with the usual segment-flange or stop a The plug-valve is provided with a horizontal port Z), which when the plug is turned may be made to register with the passage-way a in the socket member, so that gas may flow through the latter. Beneath the port 6 the plug is provided with an interior chamber 6 the wall of which at its lower end is screw-threaded, and said plug is also provided with an annular exterior horizontal flange 5 A cap-plug 0 screws into the lower end of said plug-valve 6 and closes the lower end of the chamber 6 and said cap-plug is provided with an exterior vertical groove 0 and a bottom recess 0 Two vertical pinholes 0 are also provided on the interior of the cap-plug for a purpose to be presently described.

An operating-key (Z has a stem d, which extends through the cap-plug c, and also has a circular head (Z which fits into the recess 0 of the cap-plug, and two vertically-extending pins or fins (Z which take in the holes 0 of the cap-plug. A pin 0 extends horizontally through the stem cl and projects slightly at either side thereof, and a washer c has position on the stem beneath the pin 0. A spiral spring f surrounds said stem and has its upper end contacting with the washer and its lower end seated on the cap-plug 0. This spring f serves to keep the stem d normally pressed up.

A pin g is secured inthe key (Z and extends vertically in a direction parallel with the stem (Z. This pin 9 passes through the vertical groove-0 in the cap-plug and also through the horizontal flange b on the exterior of the plugvalve, and the upper end of said pin terminates above the said flange. It will thus be seen that the horizontal flange 6 serves as a guide-bearing for the pin g. hen the stem is pressed up, as in Fig. 1, the upper end of the pin 9 will engage one of the ends of the segment-flange a on the socket member. A stationary pin 9 is secured in the horizontal flange Z2 and extends vertically toward the socket member a. This pin g has position at the side of the valve-plug and diametrically opposite the vertically movable pin g, as clearly seen in the drawings. When the valve is in the cut-off position, the movable pin g has position in front of one end of the segment-flange stop a while the stationary pin g on the flange b has position at the opposite end of said stop. This is a useful construction in that it insures that the fixed pin will always contact with the stop a when the valveplug is given a half-turn, and the movable pin will automatically lock the valve to prevent accidental turning.

The operation of the device is simple and as follows: WVhen the valve-plug 6 and stem (Z are in the position shown in Figs. 1 and 2, the ports are in the cut-off position and are locked in that position by the pins g and g,

contacting with opposite ends of the segmentflange or stop It. The pins or fins (Z on the circular head (Z permit vertical movement of the key independently of the plug-yalve, but prevent the key from being rotated independently of the plug-valve. In order to turn the valve so that the pocket 7/ will register with the passage-way a of the socket member, the stem must be pulled down vertically through the valve plug. This downward movement of the stem causes the pin to move downwardly through the horizontal flange Z) and the vertical groove 0 in the cap-plug and takes a position below the segment-flange stop a". While the pin 1 is in this lowered position the stem and plug-valve may be turned together in a horizonal plane, and the end of the said pin will pass beneath the said segment-flange stop and hold the stem in the lowered position while the ports are in reg- 'ister.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a gas-cock the combination of a socket member having a passage-way and a segment stop-flange; a plug-valve in said socket member; a pin carried at one side of said plugvalve and arranged to contact with said stopflange when the valve is in the cut-off position, and a pin extending vertically at the opposite side of said plug-valve and movable in a lengthwise direction beneath said socket member.

2. In a gas-cock the combination of a socket member having a passage-way and a segment stop-flange; a plug-valve in said socket member; a pin carried by said plug-valve and having a fixed position with respect to said valve; a key movable in a horizontal plane with said plug-valve but movable in a vertical plane independently of said valve, and a pin extending vertically from said key and in a direction parallel with the plug-valve and terminating beneath the socket member, said pin arranged to be moved in a lengthwise direction when the key is moved vertically.

3. In a gas-cock the combination of a socket member having a passage-way and a segment stop-flange; a plug-valve in said socket member and having an annular exterior flange; a pin rigidly secured in the flange of said plugvalve and extending vertically therefrom; a removable cap-plug at the lower end of said plug-valve and having a bottom recess; an operating-key having a head which fits into the recess of said cap-plug, said key and head arranged to be moved vertically with respect to said valve-plug, and a pin extending vertically from said key and passing through the annular flange of the valve-plug and termi nating beneath the socket member.

In testimony whereof I affix my signature in presence of two Witnesses.

EDIVARD D. BOOZ. \Vitnesses:

G. FERDINAND Veer, J. ALEX. HILLEARY, Jr. 

